eclipse上已经实现了，为什么这里还是不通过？
package zh.codegym.task.task18.task1808;
import java.util.*;
import java.io.*;
/*
分割文件
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
String filename1=reader.readLine();
String filename2=reader.readLine();
String filename3=reader.readLine();
FileInputStream inputStream1 = new FileInputStream (filename1);
FileOutputStream outputStream2 = new FileOutputStream (filename2);
FileOutputStream outputStream3 = new FileOutputStream (filename3);
ArrayList<Integer> b=new ArrayList<>();
byte[] c =new byte[inputStream1.available()/2+1];
byte[] d =new byte[inputStream1.available()];
if(inputStream1.available()>0){
int a=inputStream1.read(c);
outputStream2.write(c,0,a);
int e=inputStream1.read(d);
outputStream3.write(d,0,e);
}
inputStream1.close();
outputStream2.close();
outputStream3.close();
}
}